Changes for DNET-784: schema update for identity (#7)

Provider/src/FirebirdSql.Data.FirebirdClient/Schema/FbColumns.cs

@@ -64,7 +64,13 @@ protected override StringBuilder GetCommandText(string[] restrictions)
 					null AS COLLATION_CATALOG,
 					null AS COLLATION_SCHEMA,
 					coll.rdb$collation_name AS COLLATION_NAME,
-					rfr.rdb$description AS DESCRIPTION
+					rfr.rdb$description AS DESCRIPTION");
+			if (MajorVersionNumber >= 3)
+			{
+				sql.Append(@",
+					rfr.rdb$identity_type as IDENTITY_TYPE");
+			}
+			sql.Append(@"
 				FROM rdb$relation_fields rfr
 				    LEFT JOIN rdb$fields fld ON rfr.rdb$field_source = fld.rdb$field_name
 				    LEFT JOIN rdb$character_sets cs ON cs.rdb$character_set_id = fld.rdb$character_set_id
@@ -117,6 +123,10 @@ protected override DataTable ProcessResult(DataTable schema)
 			schema.BeginLoadData();
 			schema.Columns.Add("IS_NULLABLE", typeof(bool));
 			schema.Columns.Add("IS_ARRAY", typeof(bool));
+			if (MajorVersionNumber >= 3)
+			{
+				schema.Columns.Add("IS_IDENTITY", typeof(bool));
+			}
 
 			foreach (DataRow row in schema.Rows)
 			{
@@ -175,6 +185,11 @@ protected override DataTable ProcessResult(DataTable schema)
 				{
 					row["DOMAIN_NAME"] = null;
 				}
+
+				if (MajorVersionNumber >= 3)
+				{
+					row["IS_IDENTITY"] = (row["IDENTITY_TYPE"] != DBNull.Value);
+				}
 			}
 
 			schema.EndLoadData();
@@ -185,6 +200,10 @@ protected override DataTable ProcessResult(DataTable schema)
 			schema.Columns.Remove("COLUMN_ARRAY");
 			schema.Columns.Remove("FIELD_TYPE");
 			schema.Columns.Remove("CHARACTER_MAX_LENGTH");
+			if (MajorVersionNumber >= 3)
+			{
+				schema.Columns.Remove("IDENTITY_TYPE");
+			}
 
 			return schema;
 		}

Provider/src/FirebirdSql.Data.FirebirdClient/Schema/FbSchema.cs

@@ -24,21 +24,14 @@
 
 using FirebirdSql.Data.FirebirdClient;
 using FirebirdSql.Data.Common;
+using FirebirdSql.Data.Services;
 
 namespace FirebirdSql.Data.Schema
 {
 #warning New datatypes
 
 	internal abstract class FbSchema
 	{
-		#region Constructors
-
-		public FbSchema()
-		{
-		}
-
-		#endregion
-
 		#region Abstract Methods
 
 		protected abstract StringBuilder GetCommandText(string[] restrictions);
@@ -74,6 +67,7 @@ public DataTable GetSchema(FbConnection connection, string collectionName, strin
 
 		protected FbCommand BuildCommand(FbConnection connection, string collectionName, string[] restrictions)
 		{
+			SetMajorVersionNumber(connection);
 			var filter = string.Format("CollectionName='{0}'", collectionName);
 			var builder = GetCommandText(restrictions);
 			var restriction = connection.GetSchema(DbMetaDataCollectionNames.Restrictions).Select(filter);
@@ -103,6 +97,7 @@ protected FbCommand BuildCommand(FbConnection connection, string collectionName,
 			return command;
 		}
 
+
 		protected virtual DataTable ProcessResult(DataTable schema)
 		{
 			return schema;
@@ -115,6 +110,19 @@ protected virtual string[] ParseRestrictions(string[] restrictions)
 
 		#endregion
 
+		#region Private Methods
+		/// <summary>
+		/// Determines the major version number from the Serverversion on the inner connection.
+		/// </summary>
+		/// <param name="connection">an open connection, which is used to determine the version number of the connected database server</param>
+		private void SetMajorVersionNumber(FbConnection connection)
+		{
+			var serverVersion = FbServerProperties.ParseServerVersion(connection.ServerVersion);
+			MajorVersionNumber = serverVersion.Major;
+		}
+		#endregion
+
+
 		#region Private Static Methods
 
 		private static void TrimStringFields(DataTable schema)
@@ -138,5 +146,12 @@ private static void TrimStringFields(DataTable schema)
 		}
 
 		#endregion
+
+		#region Properties
+		/// <summary>
+		/// The major version of the connected Firebird server
+		/// </summary>
+		protected int MajorVersionNumber { get; private set; }
+		#endregion
 	}
 }